Molding-machine.



D. J. CAMPBELL."

- momma MACHINE. 1 APPLICATION FILED MAR. 6.19M. v 1,187,039. I Patented June 13, 1916.

2 SHEETS-SWEET I.

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DONALD JAMDs CAMPBELL, or MUSKEGON EI HTs MIcHIGAN.

MOLDING-MACHINE.

Specification of Letters Patent. Patented J 11119 13, 1916,

Application filed March 6, 1914. Serial N o. 822,834. i

To all whom it may concern: Be it known that I, DONALD J. CAMPBELL,

a citizen of the United States of America, 1

residing at Muskegon Heights, in the county of Muskegon and State of Michigan, have I invented certain new and useful Improvements in Molding-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains' to make and use the same.

My invention relates to improvements in molding machines, and more particularly to such machines for foundry use, and its object is to provide a device that will operate satisfactorily on patterns having considerable depth in the direction that pressure is applied to the sand when it is compressed, and to provide the same with various new and useful features hereinafter more fully described and particularly ect.

pointed out in the claims.

My invention consists essentially of a device in which the sand is compressed be-.

tween two members moving in opposite directions relatlve to the pattern and comprising an upper follower or ram and a lower opposing member through whlch the pattern projects and is movable therein, this lower member being fixed and the patterns movable downward through the sameduring the operation of compressing the sand, whereby the sand is moved oppositely relative to the pattern, both from above downward and from below upward with equal and Fig. the same on theline 55 of Fig. 2.

Like numbers refer to like parts of the figures.

1 represents patterns which in this case are for cylindrical bodies, such as the piston of internal combustion engines or the like. These patterns are made of greater length in all thanthe finished article by the amount of relative movement of the stripper plate '3 and the patterns, through which plate the patterns project and are vertically movable therein. 7

Obviously any pattern other than cylindrical may be used in this machine by Y merely forming the extension which moves Within the stripper plate 3 with vertical sides to fit an opening in the said plate and slide therein to the required extent.

2 represents the flask to contain the sand mold asrusual, and 4 is a removableframe or extension above the flask to-hold the sand before compression. 7

-5==represents the follower or ram of any suitable press in which the device is placed to compress the sand] This press is not shown, for that, any convenient press may -'be used, and forms no part of the invention.

6 is a suitable frame supporting the stripper plate 3, through whlch the patterns pro- 7 is aftable" carrying the'p atterns, which table has downwardly projecting legs or legs.9 of the frame.

7 10 are stops interposed between the. guides 8 and the'base .p1atel6, one being: provided for each slide 8' wherebywhen the guides engage the stops the table 7 will be prevented from further downward movement. These stops are adapted to be moved away from undertheguides to permit the table to descend to withdraw the patterns from the sand after the latter has been compressed. For this purpose each stop is provided with an inwardly projecting slotted arm having a stud Htlierein to guidethe} movement'ofthefstop and fixed in a bed plate 16.

Centrally located on the bed plate is a spider pivotedat its centerto' theb'ed plate 16 and" having radiating arms 12 respectively pivoted to the inner ends of the arms guides-Svertically slidable inways in the V 11, and a lever 13 projects from the spider V to manually adjust the same to' s'imultaneously move thestops into and out of operative position. Projecting downward from the table 7 are lugs 17, in Which is a trans;

verse rodlS engaged by one end of a slot-' ted lever 19 intermediatelyfixed ona rock shaft 20, and provided with a'counterweight '21 to balance the Weight of'the table and This rock shaft is propatterns thereon. vided with a manually operated lever 22,

' 40 I vously movethe same'into and out of operativeposition, a lever to manually move the A whereby the table can be moved downward to withdraw thepatternsfrom the sand or moved upward to restore the patterns to elevated position within the flask as occasion requires; v t r From the foregoing description the operation of my invention Willbe readily understood. With the, patterns elevated within the flask as shown in Fig.2 and the required quantity of'molding sand placed in'the flask and the device placed in a. suitable press; by forcing the ram,5 downward the sand will be compressed in a downward direction and at the" same time the patterns being free to move with the sand are moveddownward in the stripper plate 3 and thus the a sand will be compressed equally from oppo- I, site directionsand uniformly about the part of the pattern above the stripper plate; When the guides-or legs of the table strike the J stops rlO -the 7 patterns will have moved downward the, required distance through the stripper plate 3, thatportion of the patterns remaining above the plate constituting the and the operation repeated indefinitely.

What I claim is i 1. A molding. machine comprising a relatively movable stripperplate and table, patterns carried by thetable and slidably projecting through openings in the plate, ra-

dially; slidable stops at the respective corners ofthe table to control said movement, aspi'der connectedto thestops to simultane- I spider, and meansfor relatively adjusting the plate andtable, 7 n

2. A molding machine, comprising a stripper plate having openings therein, pattern extensions v vertically slidable in saidopen- I i c6 1 0;. patent may fbe obtained for ings, a' frame supporting the plate, a table vertically slidable in the frame, a counterbalance lever supporting the table and permitting free vertical movement thereof, means for manually operating the counterbalance lever to raise and lower the table and pattern extensions, stops to limit the downward movement of the table, and means for manually adjusting the stops into and out of operative position.

3. A molding machine, comprising a fixed stripper plate, a freely movable table below the same, a pattern mounted on the table extending through the plate and slidable therein, a counterbalance lever connected to the table, means for manually operating the lever to move the table, movable stops under the respective corners of the table, a spider to simultaneously move the stops into and out of operative position, and a lever to manually adjust the spider.

4. A molding machine, comprising a ver-,

tically movable follower, a fixed stripper plate below the same, a frame supporting the said plate, atable having legs at the respective corners vertically slidable in the frame, movable stops under the respective legs, a spider pivoted at the center and having arms connected to the respective stops to I simultaneously move the same into and out of operative position, and means for manually adjusting the spider,

5. A molding machine, comprising a vertically movable follower, a fixed stripper plate below the same, a frame supporting the said plate, a table vertically movable in the frame and having legs slidable in the frame, movable stops beneath the respective legs ofthe table and having inwardly projecting arms, a centrally pivoted spider attached to'the respective arms of thestops, means for manually adjusting the spider, a counterbalance lever supporting the table, and meansfor manually operating said lever to move the table.

In testimony'whereof I affiX my signature in presence of two witnesses.

' DONALD JAMES CAMPBELL. Witnesses;

jALnXANDnR VAN ZANTEN,

LEON Gr. CooKn.

five cents each, nyaddressing the "Commissioner of Eatents, Washington, D. G. 

